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UNITED STATES PATENT EEIGE GEORGE H. CHINNOCK, OF BROOKLYN, ASSIGNOR TOJABEZ A. BOSTVVICK, OF 4NEYV YORK, N. Y.

IMPROVEMENT lN CIL-CAN TOPS.

Specification forming part of Letters Patent No. 156,878, dated November17, 1874; application filed october 19, 1874.

To all whom it may concern:

Be it known that I, GEORGE H. CErNNooK, of Brooklyn, in the county ofKings and State of New York, have invented certain 'Improvements in Topsfor Closed Gans, ot' which the following is a specification:

This invention comprises a top or nozzle for oil-cans and the like, inwhich the shell or body is closed permanently at its upper end, andcarries the bearing of an actuating screw, which gives verticalmovement, without rotation,`to the valve or plunger of the nozzle. Bythis novel construction ot' the latter all leakage through or from theupper end of the nozzle or top is eectually guarded against, andprovision is made for the e'ectual operation of the plunger without anyundue application of force, and without liability of grinding orabrading the plunger when brought snugly against its seat by therotation oi' the screw.

Figure l is a vertical transverse section, on an enlarged scale, ot' atop for cans constructed according to my invention, showing the parts inposition when the can is closed; and Fig. 2 is a similar view, showingthe position of the parts when the can is opened to permit the outflowof its contents.

A indicates the upper end of a closed sheetmetal canfor example, arectangular cansuch as is commonly used for holding kerosene. In thisend is provided a circular opening, B. Soldered to the said end is acylindrical shell, C, the diameter of which is greater than that of theopenin g B, which it surrounds, as shown in the drawings, so that Withinthe shell, at the bottom thereof, is provided an inwardly-projectingiiange, constituting the seat b for the valve or plunger E, hereinafterdescribed, The shell C should be situated near one corner of the can,and at the outermost side is furnished with a spout or outlet,

c. In the opposite side of the shell is formed a small air-inlet vent orhole, f. The shell is closed at its upper end a. D is a vertical screw,the neck e of which Works through a cylindrical bearing providedcentrally in the upper end a of the shell, and the threaded portion ofwhich screws into a nut provided internally in the sleeve g, thatprojects downward from the plunger D, and which is closed at its lowerend. Formed upon the neck c ot' the screw, one above and the other belowthe upper end portion a of the shell, are two annular shoulders, e f.Upon the upper end ofthe screw, external to the shell, is a thumband-iinger piece, m, by which the screw is turned to raise or lower theplunger, as the case may be. Formed vertical in one side of the shell isan internal feather, c', which iits into a notch, a, provided in theadjacent edge ot' the plunger. By this means the plunger is preventedfrom rotating or receiving a movement about its vertical axis from theaction of the screw during the elevation or depression of theplunger.(As au equivalent to the feather and notch, as thus arranged, theplunger may be provided with a spur iittin g into an internal groove inthe shell.) The plunger should, moreover, be furnished upon its lowerside with a washer or packing, n, where it is brought upon the seat b.By turning the :crew in one direction, the shoulder f bearing againstthe under side of a', the plunger will, without turning, loe forcedsnugly down upon the seat b, as shown in Fig. 1, thereby preventing thepassage of the liquid contents of the can through the opening B to theshell, and thence out through the spout, Snc., the closed lower end ofthe sleeve g preventing any passage ot' the oil or other liquid to orthrough the bearings of the screw. By reversing the movement of thescrew the shoulder e will bear upon the upper surface ot' a', and thescrew will raise the plunger above the inner end ot' the spout c andabove the air-inlet hole f, as represented in Fig. 2', so that by simplytilting the can the contents may be poured out, the air passing inthrough f to iill the space vacated by the liquid poured out. Theplunger, in its vertical movement, being kept from rotating, ashereinbefore explained, has no frictiona-l motion in contact with theseat, and the grinding and wear of the said parts, which would occurfrom the rotation of the one in contact with the other,.is whollyobviate'd; moreover, much less force is required to bring the plunger tothe seat with the requisite tightness in closing, or in starting ittherefrom in .opening the can. This avoidance of friction, by enabling aplunger of greater area, as concerns its bearing upon the seat b, to beused, permits the employment ofa larger opening, B, than would otherwisebe available; moreover, the slight play of the 'screw in its bearingspermits the self-adjustment ofthe plunger to its seat to t snugly allaround upon the same. As an equivalent to the hereinbefore-describedarrangement of the plunger, thelatter may be placed below the seat b andbrought upward by the screw to close the openin B.

Vhat I claim as my invention is- The shell, formed with the closed upperend, carrying the bearing of the screw which gives vertical movementwithout rotation to the plunger, substantially as and for the purposeset forth.

GEO. H. OHINNOCK.

Attest:

J AMES A. WHITNEY, A. MOORE.

